Blink117 Posted February 25, 2011 Share Posted February 25, 2011 Hi I have a DYNACORD POWERMATE 1000 with protect led on. Tested ouput stage no fault found there tested for voltage befor muting relays no voltage there the fuses are fine..any clues why the protect led is on Thanks Blink117blink117@hotmail.co.uk Link to comment Share on other sites More sharing options...
swampman Posted February 28, 2011 Share Posted February 28, 2011 It is not clear where you have tested...1. presence of DC referent to Ground/chassis before output relay?2. unbalance in output power rails3. overtemperature sensors on heatsinks...4. the difficult one: overload due to short on output5. failure of "delay on" circuitJust suggestions of usual protections which cause muting to be active. Link to comment Share on other sites More sharing options...
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